I’m looking for some help resolving a problem with Zap terminated calls and a sometimes very choppy voice quality in the Zap -> SIP direction (the ZAP end sounds choppy to the SIP user, but SIP sounds OK to Zap end)
TDM2400 w/ 8 chans (2 modules)
Polycom 301 & 501 phones
Reading similar issues in this forum and on the asterisk forum, I enabled VAD (silence supression) on the Polycoms, which helped some.
I ran zttest for a few hundred itterations, and got 99.96 for the worst case 99.99 for avg.
I tried disabling the echocancel, and adjusting the echo training.
Thanks - Mark
======== zapata.conf ==============
rxwink=300 ; Atlas seems to use long (250ms) winks